Rim nut



April Z7 1926. 1,582,530

- c. NOLL RIM NUT Filed March 17, 1925 INVENTOR Apex 2?, 192%..

umrsu srarss 0F BROOKLYN, NEW YORK, ASSIGNOE TO A. SCHRADERS son", EH 3 onaanns new,

0F BRQOKLYN, NEW YORK, A COREOBATIGE 0F YORK.

RIM NUT.

Application filed March 17, 1925. Serial Noldtht.

city and State of New York, have certain new and useful Improvements in RimNuts, ofwhich thefollowing -is a specification.

This invention relates to nuts and particularly to those designed for use in con-' nection' with pneumatic tire valves for engaging the wheel rim or felly and drawing the valve casing lnwardly to a firm seat. Such nuts are customarily made of sheet 'metal, and in order to facilitate the operations of drawing'and shaping, and also tor the purpose of reducing the expense of manufacture', they are made of the thinnest I quires a g strength to withstand metal which is capable of withstanding the strains incident to their use. Where such nuts havebee'n formed with a bushing or tubular extension internally screwthreaded to engage a valve casing, and externally screwthreaded to receive heretofore been the practice to out these threads in metal of a thickness somewhat greater than the sum of the depths of the internal and external threads so as to leave an intermediate wall to provide for the necessary strength required.

According to the present invention I provide a nut of the type described which rethickness of metal only slightly in excess of the depth of one of the threads, and which, nevertheless, has suflicient ta-use, According to a preferred embodiment of my invention, I provide a rim nut of the general form illustrated in the application.

of: Julius Volckhausen,

the metal used is only slightly in excess ,0 the depth of one of the threads. And in order to permit both an internal and external thread to be out in the tubular extension of the nut, tions thereof indented, fluted or corrugated, which results in ridges being formed both on the interior and exterior of the extension, and it is in these ridges that the internal and external threads are cut. it is preferable that the indentations or corrugations extend transversely to the threads and also parallel to the axis of the tubular extension.

the borough of Brooklyn, county of a dust cap, it has the strains incident;

" depth of these ridges is approximately equal "to the thickness of Serial No. 7%,382, filed July 5, 1924, wherein'the thickness of f threads may or may not be of the same said extension has por- It is to beunderstood, however,-that these corru ations may threa s. I

In the accompanying drawings wherein I have shown the preferred embodiment of my invention,-

in use.

- Fig. 2 is an elevation of the nut.

Fig; 3 is a dlametrical section of the not. 1 Figs. 4: and 5 are a top plan view and a ,bottom plan view respectively of the'nut shown in Fig. 2.

Referring to the the rim nut as a whole, which is formed of a single sheet of metal suitably drawn and shaped to provide a body portion B, a-

tubular extension G and a lateralbase flange D. The body. portion B is preferably formed with an exterior wrench engaging surface, herein shown as'hexagonal in con-. tour, wrench ed to be tightened against a wheel rim or felly.

The tubular portion C is formed withinterior ridges E and exterior ridges F which may be formed in any desired manner. Preferably the ridges E are formed by "indenting inwardly, spaced portions of the tubular member 0, leaving or giving rise to the exterior ridges F. Another method of forming the ridges E and F is to alternately indent portions of the tubular member inwardly and outwardly to'provide in efiect a corrugated tube. Preferably the the metal, so that a screw thread having adepth somewhat less than the thickness of the metal may be cut in each of the series of ridges without interfering one with the other. Such screw one function of the rim nut herein described Q standard dust cap, which'is is to render a a No. 725 valve normally adapted to fit over artisanalso extend parallel to the Figure 1 shows the rim nut as applied drawings, let A indicate and adapted for engagement with a by means of which the nut is adapt ed. to en casing, applicable to the ho. 7 N valve casing.

The rim nut, for the purpose of economy, is made of the thinnest metal which is capable of withstanding the strains incident to its use, and according to the present invention, I have found that metal of agauge only slightly in excess of the depth of either of the threads cut therein, when the tubular extension of the nut is formed as hereinbefore described, stands up admirably well in use. By making use of such thin metal a I very considerable saving is accomplished in the cost of such nuts because of the great saving in the metal required and the greater ease in working thinner metal.

The lateral flange D serves to provide an engaging surface for the nut whenscrewed down upon the valve stein into engagement with a wheel rim or telly. Because of its large area, it is adapted to provide a strong .-frictional engagement between the nut and the Wheel rim or felly, and thus tend to prevent the unscrewing or working loose of the rim nut on the valve stem. To further increase this frictional engagement, the underside of the flange is formed with a raised limited to the or rojecting annular rib J, which is prefera ly formed adjacent the circumferential edge of the flange by depressing the top of said flange to provide an annular groove K.

While I have shown and described a pre ferred embodiment of my invention, it is to be understood that I do not wish to be precise structure disclosed, as changes therein mav be made Without departing from the spirit of thevinvention.

What I claim is: 1. A sheet metal rim nut for tire valves or the like, having a tubular extension, por-' tions of which are indented to provide internal projections, the indented portions being screw-threaded on their interior fact-S and the exterior of the extension being threaded on its exterior surface.

2. A sheet metal rim nut for tire valves or the like, havin a tubular extension which is alternately indented inwardly and outwardly to provide parallel ridges, said ridges being screw-threaded to provide internal and external threads on the tubular extension. v

3. A sheet metal rimnut having a tubular extension which is alternately indented inwardly and outwardly to form parallel ridges of a de th approximately equal to the thickness 0 the metal,said ridges having screw threads cut therein to a depth slightly less than the thickness of the metal to provide internal and external threads on the tubular extension.

4. A sheet metal rim nut having a tubular extension which is fluted or corrugated to provide alternate ridges on o posite sides of the extension, said ridges heingscrewthreaded to provide internal and external threads on the tubular extension, and said flutes or corrugations extending transversely to the inclination of the screw threads thereon.

5. A sheet metal rim nut having a body portion provided with wrench engaging surfaces and a tubular extension which is fluted or corrugated to provide alternate ridges on opposite sides of the extension, said ridges being screw-threaded to provide internal and external threads on the tubular exten- 51011.

In witness whereof, I have hereunto signed my name.

CHARLES NOLL. 

